Testing the logics of the algorithm and source code is calledBlack box testingWhite box testingBottom up testingTop down testing

Testing the logic of the algorithm and source code is called White box testing.

Here's why:

1. White box testing, also known as clear box testing, transparent box testing, and structural testing, is a method of software testing that tests internal structures or workings of an application, as opposed to its functionality (i.e. black-box testing).

2. In white box testing, an internal perspective of the system, as well as programming skills, are used to design test cases. This testing is usually done at the unit level.

3. The tester chooses inputs to exercise paths through the code and determines the appropriate outputs. This is analogous to testing nodes in a circuit, e.g. in-circuit testing (ICT).

4. White box testing can be applied at the unit, integration and system levels of the software testing process. Although traditional testers tended to think of white box testing as being done at the unit level, it is used for integration and system testing more frequently today.

5. It can test paths within a unit, paths between units during integration, and between subsystems during a system–level test. Though this method of test design can uncover many errors or problems, it might not detect unimplemented parts of the specification or missing requirements.